Dungeon Hunter: Alliance sticks to it's hack-n-slash nature right down to its easy controls. The game uses one main attack button, (X), for your primary attack. As you level up your character, you can assign various active skills to the other face buttons and activate them with a quick tap of the assigned button. Movement uses the Left Analog Stick, while the Right Shoulder Button lets you interact with the environment and the Left one lets you use the potion you have loaded up. The one exception to this game's simple controls is how you control and activate your fairy companion.
You can move the fairy around the screen with either the Right Analog Stick or the back Touchpad. This sounds simple, but when you are in the heat of a battle or in the middle of a horde of enemies, it is hard to pull your right thumb away from your attack button, or guide your fingers along the back of the system. To make things more confusing for your fingers, you activate the fairy's power by double-tapping the screen.
Okay, so think about this. You are tapping (X) to fight off enemies. You want to use your fairy, so you either guide it with the stick (and remove your thumb from the attack button), or you use the awkward back of the system. Now you've gotten your fairy in the right place, but again, you either have to tap with your right thumb, and leave the (X) button again, or use your right which is how you move your character. Personally, I feel that any time a game tries to mix button and touchscreen controls, especially if it involves a heated battle, there is something wrong. It's hard to easily switch between hitting the buttons and hitting the screen. This is a lesson developers should have learned a long time ago with the Nintendo DS.
The other problem with this setup is the fact that I seem to hold the Vita wrong, and I would imagine I'm not the only one. Based on its design, you are supposed to keep your fingers positioned resting in the groove flanking the back touchpad. I typically find this cramps my fingers during lengthy gameplay sessions. Unfortunately, in Dungeon Hunter: Alliance, if you let your fingers stretch a bit and rest on the touchpad, your fairy doesn't move on its own and just sits there in one place. Somewhat annoying.
If you are looking for an RPG hack-n-slash title to invest in for your Vita and you don't want to see what will be coming down the pipe in the next few months, then Dungeon Hunter: Alliance isn't a bad choice. It has its issues that come with any new system, but it is a good, mindless action game.